Sanjay Kumar.
Senior Full-stack / Senior Frontend Engineer (SDE III)
Building the
Future of Web.
With over 6+ years of experience, I specialize in crafting scalable, performant web applications. Currently leading frontend architecture at HighLevel, where I've architected and delivered multiple high-impact features.
My expertise spans the full stack, with deep focus on modern JavaScript frameworks, performance optimization, and building design systems that scale. I'm passionate about creating exceptional user experiences and mentoring developers.
Beyond coding, I contribute to the developer community through technical mentorship, having trained 200+ developers in modern web technologies.
Tech Stack & Expertise
Modern technologies I work with daily
Design systems should inspire creativity — not constrain it. Code should be a canvas, not a cage.
How I Work
Core principles that guide my approach to development
Communicate clearly. Partner with product/UI/QA/DevOps; drive alignment and unblock delivery
Clear communication and tight collaboration across all teams to ensure smooth delivery.
Own outcomes. Lead from architecture to release—web and mobile parity with Capacitor
Full ownership from system design through production deployment, including mobile platforms.
Raise the bar. Code reviews, modularization, caching, and rendering optimizations
Continuous improvement through rigorous code quality practices and performance optimization.
Mentor & teach. Instructor for MERN/MEAN; guide peers on complex stacks
Share knowledge and mentor team members, having trained developers across multiple platforms.
Recent Highlights
HighLevel Courses Platform
Real-time WYSIWYG builder with mobile parity
Canva-style Badge Builder
Canvas-based credential designer
Climate Tech DMRV Platform
Next.js SSR with Firebase/GCP
MERN/MEAN Instructor
Trained 200+ developers
Beyond Code
When I'm not crafting user experiences, you'll find me staying active at the gym or strumming my ukulele. I believe in maintaining a balance between technical excellence and personal growth.
Fitness
Music
Let's build something great
I respond fast and keep things simple. Choose what works for you.